Heap-based buffer overflow in the cpSeparateBufToContigBuf function in tiffcp.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0beta7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 allows remote attackers to cause a denial of service (crash) or possibly have unspecified other impact via a crafted TIFF file.
http://bugzilla.maptools.org/show_bug.cgi?id=2798
https://access.redhat.com/errata/RHSA-2019:2053
https://access.redhat.com/errata/RHSA-2019:3419
https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-12900
https://lists.debian.org/debian-lts-announce/2019/11/msg00027.html
https://usn.ubuntu.com/3906-1/
Source: MITRE
Published: 2018-06-26
Updated: 2021-03-05
Type: CWE-787
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH